A suspicious fire that involved five palm trees scorching the siding of an apartment complex at 1185 Foothill Blvd. at 2:48 yesterday morning – and threatened to spread — was quickly brought under control by but San Luis Obispo city firefighters, No one was injured.

Investigators believe it was caused by a human because of items found on the site, and because no accidental, non-human cause was possible.

Meantime, officials say a man was arrested in the area for an unrelated crime of breaking and entering around the time of the fire. Investigators are trying to determine if he was responsible for the fire, and if it was accidental or intentional. The investigation is on going.